Question

PLEASE ANSWER!! 1A. Volcanic eruptions are caused by ________.

A
increasing temperature in the Earth’s mantle.

B
the build-up of heat, energy, and pressure underground.

C
the movement of tectonic plates.

D
magma chambers turning to rock.

Answer 1

Answer: B

Step-by-step explanation:

As gas bubbles accumulate, the upward pressure increases, forcing cracks in the rocks to widen, often in the direction of Earth's surface. For magma to erupt from a volcano, this upward pressure must exceed the downward pressure that is exerted by the eight-kilometer (five mile) thick load of rock overhead.